Large energy product enhancement in perpendicularly coupled MnBi/CoFe magnetic bilayers

被引：22

作者：

Gao, T. R. ^{[1
]}

Fang, L. ^{[1
]}

Fackler, S. ^{[1
]}

Maruyama, S. ^{[1
]}

Zhang, X. H. ^{[1
]}

Wang, L. L. ^{[2
]}

Rana, T. ^{[3
,4
,5
]}

Manchanda, P. ^{[3
,4
]}

Kashyap, A. ^{[5
,6
]}

Janicka, K. ^{[2
]}

Wysocki, A. L. ^{[2
]}

N'Diaye, A. T. ^{[7
]}

Arenholz, E. ^{[7
]}

Borchers, J. A. ^{[8
]}

Kirby, B. J. ^{[8
]}

Maranville, B. B. ^{[8
]}

Sun, K. W. ^{[2
]}

Kramer, M. J. ^{[2
]}

Antropov, V. P. ^{[2
]}

Johnson, D. D. ^{[2
,9
]}

Skomski, R. ^{[3
,4
]}

Cui, J. ^{[10
]}

Takeuchi, I. ^{[1
]}

机构：

[1] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

[2] US DOE, Div Mat Sci & Engn, Ames Lab, Ames, IA 50011 USA

[3] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA

[4] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA

[5] LNM Inst Informat Technol, Dept Phys, Jaipur, Rajasthan, India

[6] Indian Inst Technol, Sch Basic Sci, Mandi, Himachal Prades, India

[7] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[8] NIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

[9] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

[10] Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99354 USA

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 06期

关键词：

NANOCOMPOSITE PERMANENT-MAGNETS; INITIO MOLECULAR-DYNAMICS; EXCHANGE; SIMULATION; MEDIA;

D O I：

10.1103/PhysRevB.94.060411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate substantial enhancement in the energy product of MnBi-based magnets by forming robust ferromagnetic exchange coupling between a MnBi layer and a thin CoFe layer in a unique perpendicular coupling configuration, which provides increased resistance to magnetization reversal. The measured nominal energy product of 172 kJ/m(3) at room temperature is the largest value experimentally attained for permanent magnets free of expensive raw materials. Our finding shows that exchange-coupled MnBi/CoFe magnets are a viable option for pursuing rare-earth-free magnets with energy products approaching those containing rare-earth elements.

引用

页数：5

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